A root web refers to a the front page of a website. All websites are made with a default root web. To access the root web, type any URL address into your web browser's URL field without specifying a page name.
Finding the Root Web
If you were directed to a website and you would like to find the root web, it's usually best to delete everything after the domain extension. Examples of domain extensions are com, org, edu, and net. Usually the information after the domain extension will take you to a sub-page within the site and not the root web page.
The Importance of the Root Web
Having a root web in any website is important simply because of the way websites are generally constructed. There is a root web or front page to the website and then all other pages from there are sub-pages.
When you look at the URL while you're visiting a website, you can see the format will generally look like this: "www.webpage.com" will be the page you start on and will offer you links to other pages that will probably have "www.webpage.com/somethingspecific." This is just the way websites are constructed.